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  • Ships today when you order by 4 PM Central
  • Genuine OEM parts
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  • Helping fix things since 1938
  • Ships today when you order by 4 PM Central
  • Genuine OEM parts
  • 90-day returns
  • Helping fix things since 1938
Marley, Qmark, BerkoGenuine OEM Part

Marley High Limit 4520-2017-000 Qmark, Berko Parts

A 300°F manual-reset high limit switch for Marley, Qmark and Berko electric heaters.

$122.40

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  • Genuine OEMFactory original part
  • Same-Day ShippingIn-stock orders by 4 PM Central
  • 90-Day ReturnsSee return policy
  • Expert Support800-654-3545Mon–Fri, 8 AM–5 PM Central
SKU: Y4520-2017-000 Categories: , ,

Compatible Models

The Marley 4520-2017-000 fits 17 models. Type your model number to check.

Don’t see your model? This list may not include every model this part fits. Call 800-654-3545 or email [email protected] and we’ll check compatibility for you.

Need help finding your model number?

Product Details

Part Number4520-2017-000
BrandMarley, Qmark, Berko
Part TypeLimit
Manufacturer DescriptionHI LIMIT L300F
ConditionNew — Genuine OEM
Temperature Setpoint300°F (149°C)
Reset TypeManual reset
Compatible Models17 (see list)
AvailabilityIn stock
ShipsSame business day if ordered by 4 PM Central
Returns90 days on new, unused items
SKUY4520-2017-000
Not sure this is the right part?Our parts experts will check it against your model number.800-654-3545 · [email protected]Mon–Fri, 8 AM–5 PM Central

About the Marley 4520-2017-000

This genuine Marley Engineered Products high limit is a safety control used in Marley, Qmark and Berko electric heating equipment. It is set to open at a fixed 300°F.

When that temperature is reached, the switch breaks the circuit and keeps the heating element off until it is reset by hand. Because it is a manual-reset control, the heater will not restart on its own after a trip.

Confirm your heater's model against the compatible-models list on this page before ordering.

Installation Tips

Turn off power to the heater at the breaker before removing any covers or replacing the limit.

Why Buy From Carroll Parts?

  • Helping Fix Things Since 1938Over 85 years of parts expertise
  • Same-Day ShippingIn-stock orders placed by 4 PM Central ship the same business day
  • 90-Day Return PolicyBuy with confidence
  • Real Parts Experts800-654-3545 · Mon–Fri, 8 AM–5 PM Central

Frequently Asked Questions

Does this limit reset itself after it trips?

No. It is a manual-reset limit, so it stays open after tripping until it is reset by hand.

Will the Marley 4520-2017-000 fit my heater?

It fits the 17 models listed under Compatible Models on this page. If your model isn’t listed, call us at 800-654-3545 and we’ll check for you.

Is the Marley 4520-2017-000 a genuine OEM part?

Yes. This is a genuine Marley factory replacement part, not an aftermarket copy.

When will my order ship?

In-stock orders placed by 4 PM Central ship the same business day.

What is your return policy?

Items must be new and unused. You can return them within 90 days. Please read our return policy before sending anything back. Questions about a return? Call 800-654-3545 or email [email protected], Mon–Fri, 8 AM–5 PM Central.